Emotions

If 2 months ago someone were to tell me that I'm going to feel jealousy, I would have laughed in his or her face. The fact is this month alone, I can feel every emotion that all those love songs talked about.
I don't know how it happen, but it did. I keep asking myself the same question over and over again. How could I be so stupid and let myself fall in love with him? I never fell for any sad story a man gave me before so why now? I feel so stupid, stubborn, jealous of his wife, excited, sad and bad for him.

Now I wonder, should I stop seeing him for awhile? Should I just talk to him via sms only and never again see 1 another?

I realize that we can never be. So how do I switch off my feeling of love?